6163573132886016 Felix Puzzle 智趣坊 Cast Cylinder 錠 As the name implies, there is a hidden trick inside the cylinder puzzle. There is absolutely no hint or clue on how to start from the outside appearance. If t Product #: felixpuzzle-Cast Cylinder 錠 2023-01-16 Regular price: $HKD$100.0 Available from: Felix Puzzle 智趣坊In stock